Quitting marshmallow test can be a rational decision

A psychological experiment known as "the marshmallow test" has captured the public's imagination as a marker of self control. This test shows how well children can delay gratification, a trait that has been shown to be as important to scholastic performance as traditional IQ. New research suggests, however, that changing one's mind about delaying gratification can be a rational decision in situations when the timing of the payoff is uncertain.View full story